[help] thermodynamics question

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SUMMARY

The discussion revolves around a thermodynamics problem involving a piston-cylinder containing a saturated liquid-vapor mixture of water at 150°C and a volume of 120L. The task is to determine the heat required to convert the mixture into saturated vapor while maintaining constant pressure. Key equations mentioned include the use of tables A-4 and A-5 for thermodynamic properties and the formula h = hf + x hfg, where x represents the quality of the mixture. The importance of demonstrating effort before seeking help is emphasized, highlighting community norms in academic forums.

PREREQUISITES
  • Understanding of thermodynamic properties and phase changes
  • Familiarity with the use of steam tables, specifically tables A-4 and A-5
  • Knowledge of the quality of a mixture in thermodynamics
  • Basic principles of heat transfer in constant pressure processes
NEXT STEPS
  • Study the use of steam tables for calculating thermodynamic properties
  • Learn how to construct T-v diagrams for phase change processes
  • Explore the concept of quality in saturated mixtures and its calculation
  • Review heat transfer calculations in constant pressure systems
USEFUL FOR

Students studying thermodynamics, particularly those working on problems involving phase changes and heat transfer in piston-cylinder systems.

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[help] thermodynamics question!

Homework Statement



Initially, a piston-cylinder has a volume of 120L and contains a saturated
liquid-vapour mixture of water at 150°C, in which 86% of the water is in the
liquid phase. The water is heated at constant pressure until it is saturated
vapour. Determine the heat required for this process. Also show the
process in a T-v diagram.

Homework Equations



1. i think the table A-4 and A-5 is required
2. h=hf + x hfg ??

The Attempt at a Solution



dont know how to start.
 
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What have you tried? The rules in this forum state that you must show some effort before the moderators help you out.
 


I think you are missing two important facts.

One is that people here volunteer their time to help. Complaining that they aren't working hard enough or fast enough to suit you isn't likely to make anyone more likely to help you. Who wants to help an ingrate with a sense of entitlement?

The second is that we insist that people who ask questions make an attempt at solving them.
 

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